:root {
  --bg-a: #ffd6e8;
  --bg-b: #ffeaf4;
  --card: #fff7fc;
  --text: #7a2d58;
  --title: #c21873;
  --accent: #ff4fa0;
  --accent-dark: #d63384;
  --shadow: 0 12px 30px rgba(194, 24, 115, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Poppins", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 15% 15%, #ffe7f2, transparent 35%),
    radial-gradient(circle at 80% 5%, #ffd6e8, transparent 45%),
    linear-gradient(160deg, var(--bg-a), var(--bg-b));
  background-size: 140% 140%;
  animation: bgShift 16s ease-in-out infinite alternate;
  overflow-x: hidden;
  padding: 24px;
}

main,
header {
  max-width: 950px;
  margin: 0 auto 20px;
}

.card {
  background: color-mix(in srgb, var(--card) 92%, white);
  border: 2px solid #ffc0dd;
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
  opacity: 0;
  transform: translateY(24px) scale(0.985);
  transition: opacity 0.7s ease, transform 0.7s ease, box-shadow 0.35s ease;
}

.card.in-view {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.card:hover {
  box-shadow: 0 18px 34px rgba(194, 24, 115, 0.22);
}

.hero {
  text-align: center;
  position: relative;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: #ffd1e7;
  font-size: 0.85rem;
  font-weight: 600;
  color: #b01766;
  margin-bottom: 10px;
  animation: badgePulse 2.4s ease-in-out infinite;
}

h1,
h2 {
  margin: 0;
  color: var(--title);
}

h1 {
  font-family: "Pacifico", cursive;
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 10px;
  animation: titleGlow 3s ease-in-out infinite;
}

h2 {
  margin-bottom: 14px;
}

.subtitle {
  margin-top: 0;
  margin-bottom: 16px;
}

.birthday-banner {
  margin: 0 auto 16px;
  max-width: 640px;
  background: linear-gradient(135deg, #ffd9ec, #ffeaf4);
  border: 2px solid #ff9fcb;
  color: #b01766;
  border-radius: 16px;
  padding: 14px 18px;
  font-size: clamp(1rem, 2.6vw, 1.2rem);
  font-weight: 700;
  text-align: center;
  box-shadow: 0 10px 22px rgba(214, 51, 132, 0.2);
}

.hero-actions,
.wish-form {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  border: none;
  background: linear-gradient(135deg, #ff65b2, var(--accent));
  color: white;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-3px) scale(1.02);
  filter: brightness(1.05);
  box-shadow: 0 10px 20px rgba(214, 51, 132, 0.25);
}

.btn-outline {
  background: white;
  color: var(--accent-dark);
  border: 2px solid #ff8ac1;
}

.timeline {
  display: grid;
  gap: 12px;
}

.timeline article {
  background: #ffe7f3;
  border-left: 5px solid var(--accent);
  border-radius: 12px;
  padding: 12px 14px;
}

.timeline h3 {
  margin: 0 0 6px;
  color: #ad165e;
}

.timeline p {
  margin: 0;
}

.wishes p {
  margin-top: 0;
}

.wish-form input {
  width: min(430px, 100%);
  border: 2px solid #ffc0dd;
  background: #fff;
  border-radius: 12px;
  padding: 10px 12px;
  font: inherit;
}

.wish-sky {
  margin-top: 14px;
  min-height: 150px;
  border-radius: 16px;
  border: 2px dashed #ffb0d2;
  padding: 10px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #fff4fa, #ffe3f1);
}

.wish {
  position: absolute;
  bottom: -30px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid #ff92c5;
  color: #b01766;
  font-size: 0.8rem;
  animation: floatUp 7s linear forwards;
  white-space: nowrap;
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.reason {
  border: 2px solid #ffb4d5;
  background: #fff;
  color: #b01766;
  border-radius: 12px;
  padding: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease, box-shadow 0.2s ease;
}

.reason:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 20px rgba(214, 51, 132, 0.25);
}

.reason-output {
  margin-top: 12px;
  background: #ffe5f2;
  border-radius: 10px;
  padding: 10px;
  min-height: 45px;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(122, 45, 88, 0.45);
  display: grid;
  place-items: center;
  padding: 20px;
  z-index: 20;
}

.modal-content {
  background: #fff4fb;
  border: 2px solid #ffb4d5;
  border-radius: 20px;
  max-width: 560px;
  width: 100%;
  padding: 22px;
}

.hidden {
  display: none;
}

.floating-hearts {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.floating-hearts::before,
.floating-hearts::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, #ff8ec4 0%, transparent 70%);
  filter: blur(14px);
  animation: drift 10s ease-in-out infinite alternate;
}

.floating-hearts::before {
  left: 8%;
  top: 8%;
}

.floating-hearts::after {
  right: 8%;
  bottom: 10%;
  animation-delay: 1.5s;
}

.floating-balloons {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.floating-balloons span {
  position: absolute;
  bottom: -120px;
  width: 34px;
  height: 42px;
  border-radius: 50% 50% 48% 48%;
  background: linear-gradient(180deg, #ff9bcb, #ff5fab);
  opacity: 0.35;
  animation: balloonRise linear infinite;
}

.floating-balloons span::after {
  content: "";
  position: absolute;
  left: 16px;
  top: 40px;
  width: 1px;
  height: 38px;
  background: rgba(176, 23, 102, 0.35);
}

.floating-balloons span:nth-child(1) { left: 8%; animation-duration: 14s; }
.floating-balloons span:nth-child(2) { left: 24%; animation-duration: 12s; animation-delay: 2s; }
.floating-balloons span:nth-child(3) { left: 42%; animation-duration: 15s; animation-delay: 4s; }
.floating-balloons span:nth-child(4) { left: 63%; animation-duration: 13s; animation-delay: 1s; }
.floating-balloons span:nth-child(5) { left: 79%; animation-duration: 16s; animation-delay: 3s; }
.floating-balloons span:nth-child(6) { left: 91%; animation-duration: 14s; animation-delay: 5s; }

.hero-photo {
  margin: 4px auto 16px;
  max-width: 340px;
}

.hero-photo img {
  width: 100%;
  display: block;
  border-radius: 18px;
  border: 4px solid #ffb8da;
  box-shadow: 0 10px 22px rgba(214, 51, 132, 0.22);
  animation: photoFloat 4.2s ease-in-out infinite;
}

.hero-photo figcaption {
  margin-top: 8px;
  font-size: 0.92rem;
  color: #b01766;
  font-weight: 600;
}

#confettiCanvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 25;
}

@keyframes bgShift {
  0% { background-position: 0% 0%; }
  100% { background-position: 100% 100%; }
}

@keyframes balloonRise {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  10% { opacity: 0.3; }
  100% { transform: translateY(-120vh) translateX(18px); opacity: 0; }
}

@keyframes badgePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

@keyframes titleGlow {
  0%, 100% { text-shadow: 0 0 0 rgba(255, 79, 160, 0); }
  50% { text-shadow: 0 2px 14px rgba(255, 79, 160, 0.28); }
}

@keyframes photoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes drift {
  to {
    transform: translateY(20px) translateX(10px);
  }
}

@keyframes floatUp {
  to {
    transform: translateY(-220px) translateX(20px);
    opacity: 0;
  }
}

@media (max-width: 640px) {
  body {
    padding: 14px;
  }

  .card {
    padding: 18px;
    border-radius: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .card {
    opacity: 1;
    transform: none;
  }
}